diff --git a/Controller/BackendController.php b/Controller/BackendController.php
index eeec8b7..5aad163 100755
--- a/Controller/BackendController.php
+++ b/Controller/BackendController.php
@@ -48,7 +48,7 @@ final class BackendController extends Controller
     public function setUpBackend(RequestAbstract $request, ResponseAbstract $response, mixed $data = null) : void
     {
         $head = $response->get('Content')->getData('head');
-        $head->addAsset(AssetType::CSS, '/Modules/Surveys/Theme/Backend/styles.css');
+        $head->addAsset(AssetType::CSS, '/Modules/Surveys/Theme/Backend/styles.css?v=1.0.0');
     }
 
     /**